Gas regulator fitting

Abstract

The aim is to provide a gas control valve in which the specified desired value range can be subsequently shifted easily in order to optimize the range of settable temperatures for the heating device without exceeding the device- and/or installation-specific admissible use conditions. To this end, a setting element ( 17 ) which serves to change the position of a temperature-sensitive element ( 8 ) and thus to actuate a switch for activating a valve has a threaded part ( 12 ) that is screwable into the housing ( 1 ) of the gas control valve. In this case, the two are connected together in a rotationally secure manner via a releasable locking mechanism, wherein a tubular latching part ( 14 ) that is firmly connected to the threaded part ( 12 ) is arranged between the pot-like setting element ( 17 ), partially surrounding the threaded part ( 12 ) with a recess ( 18 ), and the threaded part ( 12 ). By way of a stop element ( 16 ) that protrudes from the end side, the latching part ( 14 ) projects into a guiding contour ( 19 ) which is formed by an end-side aperture located in the setting element ( 17 ).

The invention claimed is: 
     
       1. A gas regulator fitting for a gas-fired heating device, the gas-fired heating device including a main burner, the gas regulator fitting comprising:
 a housing ( 1 ) defining a gas flow path in a gas-conducting area of the housing ( 1 ); 
 a main valve accommodated in the housing ( 1 ) and disposed in the gas flow path; 
 at least one second valve accommodated in the housing ( 1 ) and disposed downstream of the main valve in the gas flow path; 
 a switching system accommodated in the housing ( 1 ) and operative to regulate a volume of gas flowing to a main burner; the switching system comprising a longitudinally moveable tappet ( 7 ), a temperature-sensitive element ( 8 ) and a setting element ( 17 ); the setting element ( 17 ) comprising an aperture, wherein the temperature-sensitive element ( 8 ) is coupled to the setting element ( 17 ) and operates to alter a position of the longitudinally movable tappet ( 7 ); 
 the switching system further comprising a threaded element ( 12 ) and a latching part ( 14 ), the threaded element ( 12 ) in threaded engagement with the housing ( 1 ), the latching part ( 14 ) rigidly secured to the threaded element ( 12 ), the latching part ( 14 ) including a projecting stop element ( 16 ) extending in a direction opposite the threaded element ( 12 ), the setting element ( 17 ) coupled to the latching part ( 14 ) such that the projecting stop element ( 16 ) protrudes into the aperture, wherein a removable locking device ( 22 ) secures the setting element ( 17 ) to the threaded element ( 12 ). 
 
     
     
       2. The gas regulator fitting of  claim 1 , wherein the latching part ( 14 ) comprises a locking collar ( 20 ); and wherein the setting element ( 17 ) comprises a locking groove ( 21 ), such that the locking collar ( 20 ) protrudes into the locking groove ( 21 ). 
     
     
       3. The gas regulator fitting of  claim 1 , wherein the temperature-sensitive element ( 8 ) is a metal bellows. 
     
     
       4. The gas regulator fitting of  claim 1 , wherein the temperature-sensitive element ( 8 ) is coupled to the setting element ( 17 ) via the threaded element ( 12 ). 
     
     
       5. The gas regulator fitting of  claim 4 , wherein the temperature-sensitive element is support by a ball ( 11 ) on the threaded element ( 12 ). 
     
     
       6. The gas regulator fitting of  claim 1 , wherein the setting element ( 17 ) is cup-shaped such that the setting element ( 17 ) partly covers the threaded element ( 12 ). 
     
     
       7. The gas regulator fitting of  claim 1 , wherein the aperture forms a guide contour ( 19 ) for the stop element ( 16 ). 
     
     
       8. The gas regulator fitting of  claim 1 , wherein the removable locking device ( 22 ) comprises a screw having a tip, and wherein the threaded element ( 12 ) includes a groove for accommodating the tip of the screw. 
     
     
       9. The gas regulator fitting of  claim 1 , wherein the housing includes ribs ( 23 ) and the setting element ( 17 ) includes an extension ( 24 ) for engaging the ribs ( 23 ) such that a rotational movement of the setting element ( 17 ) relative to the housing ( 1 ) is restricted within a setting range. 
     
     
       10. The gas regulator fitting of  claim 9  configured such that the setting range is adjustable within the range defined by the stop element ( 16 ) protruding into a guide contour ( 19 ).